| MONTH | SLP ANOMALIES | TAHITI
minus DARWIN SOI |
850-hPa ZONAL WIND INDEX | 200-hPa WIND INDEX | OLR INDEX | |||
| TAHITI | DARWIN | 5N-5S
135E-180 |
5N-5S
175W-140W |
5N-5S
135W-120W |
5N-5S
165W-110W |
5N-5S
160E-160W | ||
| SEP 99 | 0.4 | 0.5 | -0.1 | 1.2 | -0.2 | -0.9 | -1.3 | 1.4 |
| AUG 99 | 1.4 | 1.4 | 0.1 | 1.3 | 0.5 | -0.6 | -0.5 | 1.0 |
| JUL 99 | 1.1 | 0.4 | 0.5 | 1.1 | 1.0 | -0.1 | 1.2 | 0.6 |
| JUN 99 | 0.6 | 0.8 | -0.1 | 1.0 | 0.3 | -1.0 | -0.3 | 0.7 |
| MAY 99 | 1.3 | 1.2 | 0.1 | 1.8 | 0.8 | -0.4 | 0.6 | 0.9 |
| APR 99 | 1.4 | -0.7 | 1.4 | 2.9 | 1.0 | -0.8 | 0.0 | 1.3 |
| MAR 99 | 0.3 | -1.1 | 0.9 | 3.5 | 1.2 | -1.1 | 0.0 | 2.0 |
| FEB 99 | 1.0 | -0.2 | 0.8 | 1.4 | 1.4 | -1.0 | 1.7 | 1.6 |
| JAN 99 | 1.8 | -1.3 | 2.0 | 3.4 | 1.6 | 0.1 | 2.2 | 2.3 |
| DEC 98 | 0.9 | -1.4 | 1.4 | 1.9 | 1.7 | 0.4 | 0.7 | 2.0 |
| NOV 98 | 0.3 | -1.4 | 1.1 | 2.1 | 1.4 | 0.1 | 1.0 | 1.7 |
| OCT 98 | 0.6 | -1.0 | 1.0 | 1.6 | 1.2 | 0.4 | 0.3 | 1.2 |
TABLE T1 - Atmospheric index values for the most recent 12 months. Indices are standardized by the mean annual standard deviation except for the Tahiti and Darwin SLP anomalies which are in hPa. Note that positive (negative) values of the 200-hPa zonal wind index imply westerly (easterly) anomalies; positive (negative) values of 850-hPa zonal wind indices imply easterly (westerly) anomalies.